Definitions

• This invention relates generally to anti- eavesdropping equipment and communication equipment, specifically it relates to an anti-eavesdropping device.
• Prior art communication devices such as telephone, radio, television and similar apparatuses have not solved the problems of industrial, political and military eavesdropping.
• Prior art anti- eavesdropping devices have been capable only of detecting the presence and location of some types of eavesdropping equipment.
• a primary object of the present invention is to provide an anti-eavesdropping device which will overcome the shortcomings of the prior art devices .
• An additional object is to provide an anti- eavesdropping device which can be used to protect the hearing of people, and facilitate communication in high noise environments, and over distances such as near jet aircraft, and in military and industrial situations.
• a further object is to provide an anti- eavesdropping device which is simple and easy to use.
• a still further object is to provide an anti-eavesdropping device which is economical in cost to manufacture .
• FIGURE 1 is a perspective view of the invention showing the face mask worn on a person.
• FIGURE 2 is a side view taken in direction of arrow 2 in Figure 1 with parts broken away.
• FIGURE 3 is an enlarged cross sectional view taken along line 3-3 in Figure 1.
• FIGURE 4 is an enlarged perspective view taken in direction of arrow 4 in Figure 1 with parts broken away.
• FIG. 1 through 4 illustrates an anti-eavesdropping device 10, which consists of a first structure 12 for containing sound waves emanating from a mouth 14 of a first person 16.
• a second structure 18 is for containing sound waves entering into the ears of a second person (not shown) .
• a first mechanism 20 in the first containing structure 12 is for converting the sound waves into electric waves.
• a second mechanism 22 in the second containing structure 18, is for converting the electric waves back into the sound waves , so that the two people can engage in conversation, in which no sound will escape into the environment to be detected in any way.
• the first sound containing structure 12 is a face mask 24.
• the second sound containing structure 18 is a headset 26.
• the first converting mechanism 20 is a microphone 28.
• the second converting mechanism 22 consists of an amplifier 30 that is electrically connected to the headset 26.
• a power supply 32 is electrically connected to the amplifier 30.
• a component 34 is for electrically connecting the amplifier 30 to the microphone 28.
• the face mask 26 contains a flexible covering 38, to fit over the mouth 14 and nose 40 of the first person 16.
• a cushion 42 is on a periphery of the flexible covering 38, to form an acoustic seal about the mouth 14 and nose 40.
• a strap 44 extends from the flexible covering 38, to fit about the head 46 of the first person 16.
• the strap 44 includes a buckle 48 to make the strap 44 adjustable to fit different sized heads 46.
• the headset 26 consists of a pair of headphones 47.
• An adjustable headband 49 extends between the headphones 47, so that the headphones 47 will be supported against the ears of the second person.
• Each headphone 47 includes a housing 50 connected to one end of the adjustable headband 49.
• a grille 52 is on the housing 50, to face one ear.
• a small speaker 54 is within the housing 50 behind the grille 52.
• a cushion 56 is on a periphery of the housing 50 about the grille 52, to form an acoustic seal about the ear .
• the power supply 32 is a battery 58.
• a receptacle 60 is mounted to one housing 50 opposite from the grille 52, to hold the amplifier 30 and the battery 58 therein.
• a lid 62 is hinged at 64 to the receptacle 60, so that the battery 58 can be removed and replaced when needed.
• the electrical connecting component 34 consists of a first jack 66 on the flexible covering 38 of the face mask 24, electrically connected to the microphone 28 therein.
• a second jack 68 on the receptacle 60 is electrically connected to the amplifier 30 therein.
• An elongate electrical cord 70 is provided, with a pair of plugs 72, 74 each of which is connected to each end of the elongate electrical cord 70. The plugs 72, 74 can engage with the first jack 66 and the second jack 68.
• An apparatus 76 is in the flexible covering 38 of the face mask 24, for allowing air to enter for breathing, while preventing sound to leave therefrom.
• the breathing apparatus 76 as best seen in Figure 3, is an elongated hollow tube 78 extending upwardly from the flexible covering 38 of the face mask 24, adjacent the nose 40 of the first person 16.
• the elongated hollow tube 78 has a plurality of staggered baffles 80, some of which extend downwardly while others extend upwardly at an angle therein. The air can enter the hollow tube 78, while the baffles 80 prevent sound from exiting the hollow tube 78.
• the device 10 can also contain an on/off volume switch.
• Other embodiments are also possible, such as the face mask 24 covering only the mouth 14, leaving the nose 40 to breathe naturally.
• the face mask 24 can also cover the mouth 14, the nose 40, face and head 46 of the first person 16, to contain the sound waves.
• Earphones can be used instead of headphones 47.
• a combination microphone-earphone can be utilized to make a version that picks up sound from the ear.
• the breathing apparatus 76 described above is the preferred type to be utilized. Other kinds of breathing apparatuses can also be used.
• the function of transferring the electronic message from the face mask 24 to the headphones 47 can also be done in other ways, such as by radio transmission for longer distance communications, or by using hollow tubes which conduct sound in place of microphones, speakers and wires.

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• Soundproofing, Sound Blocking, And Sound Damping (AREA)

Applications Claiming Priority (1)

Publications (2)

Family

ID=22255409

Family Applications (1)

Country Status (2)

Family Cites Families (4)

• 1996
  • 1996-07-01 EP EP96923565A patent/EP0904672A4/de not_active Withdrawn
  • 1996-07-01 AU AU64043/96A patent/AU6404396A/en not_active Abandoned

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